Programmable power supplies for cellular base stations and related methods of reducing power loss in cellular systems
Methods of powering a radio that is mounted on a tower of a cellular base station are provided in which a direct current (“DC”) power signal is provided to the radio over a power cable and a voltage level of the output of the power supply is adjusted so as to provide a substantially constant voltage at a first end of the power cable that is remote from the power supply. Related cellular base stations and programmable power supplies are also provided.
1. An apparatus configured to be electrically coupled to a direct current (DC) power input of a radio through radio ends of power conductors, the apparatus comprising: a DC-DC voltage converter including a first input, a second input, and an output; and wherein the first input is configured to receive a DC power; wherein the output is configured to be coupled to first ends, of the power conductors, which are opposite the radio ends; wherein the second input is configured to receive parameter data about the radio; wherein the DC-DC voltage converter is configured to provide, at the output, a first DC voltage level determined with use of the parameter data; wherein the DC-DC voltage converter is further configured to maintain a second DC voltage level at the radio ends of the power conductors that exceeds a nominal DC input voltage level of the radio, at which the radio is recommended to operate.
2. The apparatus of claim 1 , wherein the second DC voltage level is regulated relative to any changes in direct current drawn from the output.
3. The apparatus of claim 1 , wherein the second DC voltage level is less than a maximum DC input voltage level of the radio.
4. The apparatus of claim 1 , wherein the second DC voltage level is within four volts of a maximum DC input voltage level of the radio.
5. The apparatus of claim 1 , wherein an absolute value of the nominal DC input voltage rating is 48V.
6. The apparatus of claim 1 , wherein the DC-DC voltage converter is a DC-DC voltage boost converter.
7. The apparatus of claim 1 , wherein the parameter data is a DC voltage value measured at the DC power input of the radio.
8. A method for providing a first direct current (DC) power to a DC power input of a radio through radio ends of power conductors, the method comprising:
receiving, at a first input of a power supply, a second DC power;
receiving, at a second input of the power supply, a parameter value of the radio;
providing the first DC power from an output, of the power supply, configured to be coupled to first ends, of the power conductors, opposite the radio ends, wherein the first DC power has a first DC voltage level, at the output, determined with use of the parameter value of the radio; and
maintaining a second DC voltage level at the DC power input of the radio that exceeds a DC input voltage level, of the radio, at which the radio is recommended to operate.
9. The method of claim 8 , wherein the second DC voltage level is substantially constant notwithstanding any changes in current drawn from the output.
10. The method of claim 8 , wherein the second DC voltage level is less than a maximum DC voltage level of the radio.
11. The method of claim 8 , wherein the second DC voltage level is within four volts of a maximum DC voltage level of the radio.
12. The method of claim 8 , wherein an absolute value of the DC input voltage level at which the radio is recommended to operate, is 48V.
13. The method of claim 8 , wherein the power supply is a DC-DC boost voltage converter.
14. The method of claim 8 , wherein the parameter value is a DC voltage value measured at the DC power input.